The Prince and Princess of Walesโ Instagram account posted the adorable snap.
Which also features Prince George and Princess Charlotte, this afternoon โ after the future King was seen dad dancing at the gig.
The dad-of-three was celebrating his 42nd birthday.
The Instagram post said: โThank you Taylor Swift for a great evening!โ
Swift herself also shared a cute snap she took after the gig with William, George, Charlotte and her American football player boyfriend Travis Kelce.
She wrote: โHappy Bday M8! London shows are off to a splendid start.โ
George, 10, looked like the double of his dad in a blue buttoned Ralph Lauren shirt and jeans, while Charlotte, nine, beamed at the camera in a sparkly top.
Swift, 34, kicked off the UK leg of her The Eras Tour at Wembley Stadium in front of 89,000 fans on Friday.
Footage was also posted on social media showing William dancing in the crowd among thousands of roaring Swifties.
He was seen โ dressed in a buttoned down shirt and blazer โ swaying his arms as he got into the music on the terrace.
The video, filmed by someone on a lower tier, shows Swift on the stage in the distance as she performs Shake It Off before panning round to William shaking his arms and torso.
A post of it on X adds: โPrince William being a 1989 girlie is taking me OUT.โ
Other royal fans hailed Wills for his moves, one wrote: โLoving the enthusiasm! Taylor really is for everyone. Haha!!โ
โHeโs a Prince but heโs a King for that,โ added another.
โNow heโs got some moves,โ agreed a third.
Someone else praised: โHe just living his best life!โ
William was spotted in the crowd for Englandโs drab 1-1 draw with Denmark in Germany on Thursday in Euro 2024.
Yesterday, wife Princess Kate posted a snap of her husband with their kids on a beach, adding โWe all love you, Papaโ to mark his birthday.
William previously shared the stage with Swift at Kensington Palace in 2013 to perform Livinโ On A Prayer by Bon Jovi for a charity event.
He later said he obeyed โlike a puppyโ the singerโs request for him to join her.
He revealed in a 2021 interview:ย โI canโt believe Iโm actually telling you this story โ I turn up and Jon Bon Jovi and Taylor Swift are at the event, which nearly knocked me off my feet.
โAnd then, I went inside, met everybody, a lot of handshaking to do those nights, a lot of chatting. I try and be charming and interactive.ย
โShe puts her hand on my arm, looks me in the eye and says: โCome on, William โ letโs go and singโ.โ
He added that he was โcringingโ just recalling the incident.
Earlier on Friday, the Buckingham Palace band performed a rendition of Swiftโs 2014 hit Shake It Off to mark her tour arriving in the city.
Among the other attendees at the concert were Labour leader Sir Keir Starmer and his wife Victoria.
The politician, who is currently ahead in the polls to take over as Prime Minister on July 4, posted on X: โโSwiftโ campaign pitstop.โ
Swift told the 89,000-strong crowd: โOh my God, London, look what youโve done. What better way to spend a Friday night than in the most exhilarating city in the world?โ
Friday nightโs concert was the first of three sold-out dates at Wembley, with the international sensation returning in August to perform another five.
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Source: Tampa Bay Times